sccm 2007 active directory no clients

I am setting up SCCM 2007 for the first time. The server is 2008 DC running sql 2008 with sccm 2007 on top. I have a second 2008 DC also on the network and a 2003 member server. My boundaries are setup to find by active directory. I verified the two other machines are showing up in active directory

When I go to all systems I only see the 2008 DC that sccm is installed on. Is there something that needs to be run to find the clients ?
I also notice when I go to any of the other groups like all users they are blank. I may have missed something in connecting AD to it?